Remove modulation by input color in convolution FPs

Change-Id: Ib234c599db39d8b911023d4753a608383885197b
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/341737
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
2 files changed